:root {
  --primary: #DC2626; --primary-hover: #B91C1C; --secondary: #EF4444;
  --accent: #34D399; --success: #10B981; --error: #EF4444;
  --bg: #1A0808; --bg-elevated: #2A0E0E; --bg-card: #351818;
  --bg-input: #1A0808; --text: #FCEAEA; --text-muted: #D9A0A0; --text-dim: #8B5555;
  --border: #401A1A; --border-hover: #602A2A; --radius: 12px; --radius-sm: 8px;
  --font: 'Inter', system-ui, sans-serif; --transition: 200ms ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;overflow:hidden}
.app{display:flex;flex-direction:column;height:100vh}

.header{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;background:var(--bg-elevated);border-bottom:1px solid var(--border);gap:10px;flex-shrink:0;flex-wrap:wrap}
.header-left{display:flex;align-items:center;gap:12px}
.logo{font-size:1.3rem}
.header-title{font-size:1.05rem;font-weight:700;background:linear-gradient(135deg,var(--primary),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.header-right{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.search-input{padding:5px 10px;font-size:.72rem;font-family:var(--font);background:var(--bg-input);border:1px solid var(--border);border-radius:6px;color:var(--text);outline:none;width:140px}
.search-input:focus{border-color:var(--primary)}

.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;font-size:.8rem;font-weight:500;font-family:var(--font);border:none;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition);white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-hover));color:#fff;box-shadow:0 2px 8px rgba(220,38,38,.3)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 16px rgba(220,38,38,.4)}
.btn-ghost{background:transparent;color:var(--text-muted);border:1px solid var(--border)}
.btn-ghost:hover{background:var(--bg-card);color:var(--text);border-color:var(--border-hover)}
.btn-sm{padding:5px 10px;font-size:.72rem}
.btn-xs{padding:3px 8px;font-size:.6rem}

.goal-bar{display:flex;align-items:center;gap:10px;padding:6px 20px;background:var(--bg-elevated);border-bottom:1px solid var(--border);flex-shrink:0}
.goal-text{font-size:.68rem;color:var(--text-dim);white-space:nowrap}
.goal-track{flex:1;height:6px;background:var(--border);border-radius:3px;overflow:hidden}
.goal-fill{height:100%;background:linear-gradient(90deg,var(--primary),var(--accent));border-radius:3px;transition:width .5s ease}

.main{display:grid;grid-template-columns:1fr 1fr 1fr;flex:1;overflow:hidden;gap:1px;background:var(--border)}
.shelf{background:var(--bg);padding:12px;display:flex;flex-direction:column;overflow:hidden}
.shelf-title{font-size:.82rem;font-weight:600;margin-bottom:8px;display:flex;align-items:center;gap:6px}
.shelf-count{font-size:.6rem;padding:1px 6px;border-radius:10px;background:rgba(220,38,38,.15);color:var(--secondary)}
.shelf-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:6px}

.book-card{padding:10px 12px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);display:flex;flex-direction:column;gap:4px;cursor:pointer;transition:all var(--transition)}
.book-card:hover{border-color:var(--primary);transform:translateY(-1px)}
.book-title{font-size:.78rem;font-weight:600}
.book-author{font-size:.65rem;color:var(--text-muted)}
.book-meta{display:flex;gap:8px;font-size:.6rem;color:var(--text-dim);flex-wrap:wrap}
.book-actions{display:flex;gap:4px;margin-top:2px}
.stars{color:var(--accent);font-size:.7rem;cursor:pointer}
.genre-tag{font-size:.55rem;padding:1px 5px;border-radius:3px;background:rgba(52,211,153,.12);color:var(--accent)}

.modal{position:fixed;inset:0;background:rgba(0,0,0,.6);display:flex;align-items:center;justify-content:center;z-index:100}
.modal-content{background:var(--bg-elevated);border:1px solid var(--border);border-radius:var(--radius);padding:20px;width:340px;max-width:90vw;display:flex;flex-direction:column;gap:10px}
.modal-content h3{font-size:.9rem;font-weight:600}
.modal-actions{display:flex;gap:8px;justify-content:flex-end}
.form-group{display:flex;flex-direction:column;gap:3px}
.form-group label{font-size:.68rem;font-weight:500;color:var(--text-dim)}
.input{padding:8px 12px;font-size:.78rem;font-family:var(--font);background:var(--bg-input);border:1px solid var(--border);border-radius:6px;color:var(--text);outline:none}
.input:focus{border-color:var(--primary)}

.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);padding:10px 20px;background:var(--bg-card);border:1px solid var(--primary);border-radius:var(--radius-sm);color:var(--secondary);font-size:.8rem;font-weight:500;z-index:200;animation:toast-in .3s ease}
@keyframes toast-in{from{opacity:0;transform:translateX(-50%) translateY(10px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}
::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}
@media(max-width:768px){.main{grid-template-columns:1fr;grid-template-rows:auto auto auto}}